Folding pocket knife



Jan. 13, 1953 T. TvElT 2,624,939

VFOLDING POCKET KNIFE Filed July 5. 1947 INVENTOR. 70,965 TVE/7 A T TOR/VE Patenteoi Jan. 13, 1953 UNITED STATES vATENT OFFICE FOLDING POCKET KNIFE Torger Tveit, Lidgerwood, N. Dak.

Application July 5, 1947, Serial No. 759,044

2 Claims. (Cl. 30-161) The present invention relatesto pocket knives andthe like and particularly to folding knives in which a cutting blade is arranged to be folded into the handle when not in use.

The main object of my invention is to provide a folding pocket knife of the type indicated which has facilities for extending the knife blade beyond the working end of the handle for use and for concealing said blade within the handle when in idle condition.

An ancillary object is to provide a knife of this character 'with a Split bolt having a blade pivotally mounted between the two ends thereof and being also capable of Yaccommodating a locking member thereon for retaining said blade in open and closed positions, at will.

It is also an object to provide a knife of the mentioned character with a split lock nut for locking the knife blade in either one of its attained` positions to render the knife safe.

Other objects andadvantages will appear more fully in 4detail as this specification proceeds.

' In order to bring out theyfeatures of the invention in clear and comprehensible manner, the same is illustrated in the accompanying drawing forming part hereof, and in which,

Figure l is an elevation of a knife made according to the invention and embodying the salient features thereof in a practical form, the knife belng shown closed.

Figure 2 is a side elevation of the same knife.

Figure 3 is a transverse section of the knife taken on the line 3-3 in Figure l.

Figure 4 is a top or plan view of the knife shown in Figure l.

Figure 5 is a transverse section taken on line 5-5 in Figure 2.

Figure 6 is a vertical fragmentary section of the upper end of the knife taken on line 6-6 in Figure 4.

Figure 'l is a longitudinal section taken when the knife blade is extended into useful position, a second blade still being -disposed in the closed position within the handle.

Throughout the views, the same reference numerals indicate the same parts.

Pocket knives and hunting knives are often useful only if tolerably large, but if made with the blade rigid with the handle, they occupy considerable space and constitute a definite hazard to have around with an exposed sharp blade. Of course, covers for such knives are often used, but they then occupy even more room and are bulky enough to present a problem to the person carrying them with other supplies on a trip.

ends, and in fact, the slot is preferably carried` entirely 'through along the whole length of the bolt-formed member which is thus divided into two similar opposite members I2, I3. Between these opposed members are disposed a pair of knife blades I4, I5, pivoted independently at the ends thereof to the ends I6, I1, I8, I9 of said members I2, I3 by transverse pivot pins 20, 2I,

passing through the knife shanks 22, 23 in such fashion that these pins are disposed at one end midway between a pair of threads upon the knife members I2 and I3, and at the opposite endsterminate in line with a thread each. The outer convex portions of the ends I5 to I9 of knife members I2, I3 are threaded for receiving nuts 24, 25 which have each a side slot at 26, 21, the shanks of the blades being cut along their edges to correspond to the threads of the mentioned ends and allow the nuts to be turned upon said threaded ends. The upper blade I4 has a small slot 28 accessible when the knife is closed for being caught by the finger nail in order to swing said blade open, as will be further explained.

To permit the blades I4 and I5 to be opened or closed, when the slot 26 carried by the nut 24 is in register therewith, it will be noted that the threads, for a width sufficient to permit the blade shank to be rotated, are eliminated from the nut at a position opposite the said slot in the nut. Preferably, the blade shank 22, is threaded only along its outer edge adjacent its cutting portion the same being adapted to be engaged by the threads of the nut to lock the blade in open position upon rotation of said nut.

The knife members I2, I3 are externally reinforced by a pair of handle members '29, 30 of bone, horn, bre or plastic, and at the rear, a strip of the same material is fitted at 3I between said handle members and preferably cemented thereto to close the rear of slot Il. At both ends, these handle members have reinforcing collars 32, 33 fitted into recessed portions 34, 35 therein. The front portions of these reinforcing collars are cut open at 36, 3'I in line with the slot II previously referred to, in order to provide clearance for opening the blades, The front edge of handle member 30 has a clearance portion 38 allowing access to the finger nail slot 28 on blade I4 for opening said blade outward from the closed position shown in Figures 1 to 6. When the blades are closed within the handle, the nuts 24, 25 may be turned part of a revolution from register of their slots 2S, 2'I with the slot I I, so that the nuts retain the blade shanks in line with the ends of the handle members and normally prevent the blades from being opened accidentally.

When one of the blades is to be opened, say blade I4, the upper nut 24 is turned just enough to register its slot 36 with the blade I4 and handle slot Il, when the shank 22 will be free to rotate about pivot pin 20 by swinging blade I4 into the open position shown in Figure '7, at which time the nut may again be turned to obstruct the shank so that the blade is held firmly in its open position. The same procedure is followed for opening the other blade I5 and its locking nut 25 manipulated for releasing the blade and then holding it open. As soon as either blade thus opened should be closed, the respective locking nut is turned to allow the blade to swing inward through the slot in the nut into closed position, after which the nut is again turned to obstruct the blade shank and preventl opening of the blade thus closed.

The knife may have only one blade, if so desired, but if it has two as shown and described above, one may be made into a screw driver blade, if desired, or both blades may have cut ting edges.

Manifestly, variations may be resorted to, and parts and features may be modified or used without others within the scope of the appended claims.

Having now fully described my invention, I claim:

1. In a folding knife including a bolt provided with a slot extending longitudinally of the same from end to end thereof, a threaded nut portion formed upon the bolt at one end provided with a slot registering with the slot in the bolt, a knife blade pivotally supported within the slot of the handle to extend through the slot of the bolt when in one position with respect to the handle. a locking nut threadedly engaging the bolt for co-operating with the latter to releasably hold the blade against movement relatively to the said locking nut being formed with a slot therein adapted to register with the slot of the bolt when the locking nut is in a certain position with respect to the bolt and screw threads formed upon the end portion of the knife shank adjacent the said pivotal support for engagement by the locking nut to secure said blade aga-inst movement when the blade is in either the open or closed position.

2. In a folding knife, a handle portion provided with a longitudinal blade receiving slot, a knife blade pivotally supported at one end within said slot, a nut having a slot adapted to be brought into registry with the slot in the handle threadedly engaging the handle portion adjacent the pivotal blade support, and threads formed on the knife blade which are adapted to be engaged by the nut to releasably secure the blade against movement relative to the handle when said blade is in the open or closed position.

TORGER TVEIT.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 459,056 Truax Sept. 8, 1891 684,016 Weidknecht Oct. 8, 1901 988,068 Beardsley et al. Mar. 28, 1911 1,415,887 McWilliams May 16, 1922 

